Source Code Cross Referenced for BasicRelation.java in  » Database-ORM » MMBase » org » mmbase » bridge » implementation » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database ORM » MMBase » org.mmbase.bridge.implementation 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:
003:        This software is OSI Certified Open Source Software.
004:        OSI Certified is a certification mark of the Open Source Initiative.
005:
006:        The license (Mozilla version 1.0) can be read at the MMBase site.
007:        See http://www.MMBase.org/license
008:
009:         */
010:
011:        package org.mmbase.bridge.implementation;
012:
013:        import org.mmbase.security.*;
014:        import org.mmbase.bridge.*;
015:        import org.mmbase.module.core.*;
016:        import org.mmbase.util.logging.*;
017:
018:        /**
019:         * @javadoc
020:         *
021:         * @author Rob Vermeulen
022:         * @author Pierre van Rooden
023:         * @version $Id: BasicRelation.java,v 1.43 2007/02/10 15:47:42 nklasens Exp $
024:         */
025:        public class BasicRelation extends BasicNode implements  Relation {
026:            private static final Logger log = Logging
027:                    .getLoggerInstance(BasicRelation.class);
028:
029:            private RelationManager relationManager = null;
030:            protected int snum;
031:            protected int dnum;
032:
033:            private static final int UNSET = -999;
034:
035:            private int sourceNodeType = UNSET;
036:            private int destinationNodeType = UNSET;
037:
038:            protected boolean relationChanged = false; // Indicates a change in snum or dnum
039:
040:            /**
041:             * @javadoc
042:             */
043:            BasicRelation(MMObjectNode node, BasicCloud cloud) {
044:                super (node, cloud);
045:            }
046:
047:            /**
048:             * @javadoc
049:             */
050:            BasicRelation(MMObjectNode node, BasicRelationManager nodeManager) {
051:                super (node, nodeManager);
052:            }
053:
054:            /**
055:             * @javadoc
056:             */
057:            BasicRelation(MMObjectNode node, BasicCloud cloud, int id) {
058:                super (node, cloud, id);
059:            }
060:
061:            @Override
062:            public final boolean isRelation() {
063:                return true;
064:            }
065:
066:            @Override
067:            public Relation toRelation() {
068:                return this ;
069:            }
070:
071:            /**
072:             * Initializes the node.
073:             * Determines nodemanager and cloud (depending on information available),
074:             * Sets references to MMBase modules and initializes state in case of a transaction.
075:             */
076:            @Override
077:            protected void init() {
078:                super .init();
079:                if (nodeManager instanceof  RelationManager) {
080:                    relationManager = (RelationManager) nodeManager;
081:                }
082:                snum = getIntValue("snumber");
083:                dnum = getIntValue("dnumber");
084:
085:            }
086:
087:            public Node getSource() {
088:                // Note that this will not return an accurate value when the field is
089:                // edited during a transaction.
090:                return nodeManager.getCloud().getNode(snum);
091:            }
092:
093:            public Node getDestination() {
094:                // Note that this will not return an accurate value when the field is
095:                // edited during a transaction.
096:                return nodeManager.getCloud().getNode(dnum);
097:            }
098:
099:            public void setSource(Node node) {
100:                if (node.getCloud() != cloud) {
101:                    throw new BridgeException(
102:                            "Source and relation are not in the same transaction or from different clouds.");
103:                }
104:                relationChanged = true;
105:                int source = node.getIntValue("number");
106:                if (source == -1) {
107:                    // set a temporary field, transactionmanager resolves this
108:                    getNode().setValue("_snumber",
109:                            node.getValue(MMObjectBuilder.TMP_FIELD_NUMBER));
110:                } else {
111:                    getNode().setValue("snumber", source);
112:                }
113:                snum = node.getNumber();
114:                sourceNodeType = node.getIntValue("otype");
115:            }
116:
117:            public void setDestination(Node node) {
118:                if (node.getCloud() != cloud) {
119:                    throw new BridgeException(
120:                            "Destination and relation are not in the same transaction or from different clouds.");
121:                }
122:                relationChanged = true;
123:                int dest = node.getIntValue("number");
124:                if (dest == -1) {
125:                    // set a temporary field, transactionmanager resolves this
126:                    getNode().setValue("_dnumber",
127:                            node.getValue(MMObjectBuilder.TMP_FIELD_NUMBER));
128:                } else {
129:                    getNode().setValue("dnumber", dest);
130:                }
131:                dnum = node.getNumber();
132:                destinationNodeType = node.getIntValue("otype");
133:            }
134:
135:            public RelationManager getRelationManager() {
136:                if (relationManager == null) {
137:                    int stypenum = BasicCloudContext.mmb.getTypeRel()
138:                            .getNodeType(snum);
139:                    int dtypenum = BasicCloudContext.mmb.getTypeRel()
140:                            .getNodeType(dnum);
141:                    if (log.isDebugEnabled()) {
142:                        log.debug(stypenum + ", " + dtypenum + ", "
143:                                + getNode().getIntValue("rnumber"));
144:                    }
145:
146:                    relationManager = cloud.getRelationManager(stypenum,
147:                            dtypenum, getNode().getIntValue("rnumber"));
148:                }
149:                return relationManager;
150:            }
151:
152:            /**
153:             *
154:             * @javadoc
155:             */
156:            void checkValid() {
157:                if (log.isDebugEnabled()) {
158:                    log.debug("s: " + snum + " d: " + dnum + " st: "
159:                            + sourceNodeType + " dt: " + destinationNodeType);
160:                }
161:                //int snumber = snumtype.getNumber();
162:                //int dnumber = dnumtype.getNumber();
163:
164:                if (sourceNodeType == UNSET) {
165:                    sourceNodeType = -1;
166:                    if (snum != -1)
167:                        sourceNodeType = BasicCloudContext.mmb.getTypeDef()
168:                                .getNodeType(snum);
169:                }
170:                if (destinationNodeType == UNSET) {
171:                    destinationNodeType = -1;
172:                    if (dnum != -1)
173:                        destinationNodeType = BasicCloudContext.mmb
174:                                .getTypeDef().getNodeType(dnum);
175:                }
176:
177:                int rnumber = getNode().getIntValue("rnumber");
178:                if (!BasicCloudContext.mmb.getTypeRel().contains(
179:                        sourceNodeType, destinationNodeType, rnumber)) {
180:                    if (!BasicCloudContext.mmb.getTypeRel().contains(
181:                            destinationNodeType, sourceNodeType, rnumber)) {
182:                        if (!cloud.hasNode(sourceNodeType)) {
183:                            throw new BridgeException(
184:                                    "Source type of relation "
185:                                            + this 
186:                                            + ": "
187:                                            + sourceNodeType
188:                                            + " does not point to a valid node.");
189:                        }
190:                        if (!cloud.hasNode(destinationNodeType)) {
191:                            throw new BridgeException(
192:                                    "Destination type of relation "
193:                                            + this 
194:                                            + ": "
195:                                            + destinationNodeType
196:                                            + " does not point to a valid node.");
197:                        }
198:                        if (!cloud.hasNode(rnumber)) {
199:                            throw new BridgeException("Rnumber of relation "
200:                                    + this  + ": " + rnumber
201:                                    + " does not point to a valid node.");
202:                        }
203:                        throw new BridgeException(
204:                                "Source and/or Destination node are not of the correct type, or relation not allowed ("
205:                                        + cloud.getNode(sourceNodeType)
206:                                                .getValue("name")
207:                                        + " ("
208:                                        + snum
209:                                        + "),"
210:                                        + cloud.getNode(destinationNodeType)
211:                                                .getValue("name")
212:                                        + " ("
213:                                        + dnum
214:                                        + "),"
215:                                        + cloud.getNode(rnumber).getValue(
216:                                                "sname") + ")");
217:                    }
218:                }
219:
220:            }
221:
222:            @Override
223:            public void setValueWithoutProcess(String fieldName, Object value) {
224:                checkWrite();
225:                if ("rnumber".equals(fieldName)) {
226:                    throw new BridgeException("Not allowed to change field '"
227:                            + fieldName + "'.");
228:                } else if ("snumber".equals(fieldName)
229:                        || "dnumber".equals(fieldName)) {
230:                    relationChanged = true;
231:                }
232:                super .setValueWithoutProcess(fieldName, value);
233:            }
234:
235:            @Override
236:            public void commit() {
237:                // Check types of source and destination
238:                // Normally, this check would be run in the core.
239:                // However, the current system mdoes not throw an exception when a wrong
240:                // node is created, we want to do this so for them moment
241:                // we perform this check here.
242:                // Note that we do not realign the node since InsRel does it for us,
243:                // but we DO update snum and dnum.
244:                //
245:                // XXX:This check should ultimately be removed, once we have an agreement
246:                // on throwing the exception in the core
247:
248:                checkValid();
249:                if (!(BasicCloud.isTemporaryId(snum) || BasicCloud
250:                        .isTemporaryId(dnum))) {
251:                    if (isNew()) {
252:                        cloud
253:                                .verify(Operation.CREATE, BasicCloudContext.mmb
254:                                        .getTypeDef().getIntValue(
255:                                                getNodeManager().getName()),
256:                                        snum, dnum);
257:                        relationChanged = false;
258:                    } else {
259:                        if (relationChanged) {
260:                            cloud.verify(Operation.CHANGE_RELATION, noderef
261:                                    .getNumber(), snum, dnum);
262:                            relationChanged = false;
263:                        }
264:                    }
265:                }
266:                super .commit();
267:                if (!(cloud instanceof  Transaction)) {
268:                    snum = getNode().getIntValue("snumber");
269:                    dnum = getNode().getIntValue("dnumber");
270:                }
271:            }
272:
273:        }
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